1. Type of System
The following four types of roofing systems will be
accepted. Any other type of roof system must have written approval of the State
Department of Education:
a. A four-ply
fiber glass hot applied built-up roofing system.
b. A single-ply ethylene propylene diene
monomer (EPDM) which can be loose laid, adhered or mechanically attached.
c. A modified bitumen system which
can be heat welded, hot bitumen, or adhered; and with a surfacing which shall
completely cover the membrane.
d. A
standing seam metal roof system shall be from a single manufacturer with a
minimum of 24 gauge galvalume sheets attached to slip clips for expansion and
all seams double locked or pittsburged rolled.
Roofs shall be specified, as well as guaranteed, as a system
and shall include vapor retarders, insulation, bitumen, felts, membranes,
flashings, metals, decks, and/or any other items where required by the proposed
roof design. All manufacturers' materials used in the roofing system shall be
specified to meet the latest available ASTM standards for individual components
of the roofing system. Certification from the roofing manufacturer shall be
furnished at the pre-roofing conference as well as when the material is
delivered to job site.
2. GUARANTEE
a. The four-ply built-up roof system shall
have a 20-year unlimited manufacturer's guarantee for water tightness covering
material and workmanship on the entire system.
b. The single-ply EPDM system shall have a
15-year manufacturer's guarantee for water tightness covering material and
workmanship on the entire system, limited to the installation cost of the roof
system.
c. The modified bitumen
roof system shall have a 20-year manufacturer's guarantee for water tightness
covering material and workmanship on the entire system, limited to the
installation cost of the roof system.
d. The standing seam metal roof shall have a
20-year, 6-month unlimited manufacturer's guarantee for water tightness
covering material and workmanship on the entire system.
e. In addition to the above guarantee, the
general contractor and/or the roofing contractor shall provide a written
guarantee agreeing to keep the roof free of leaks for a period of two (2) years
starting at the time of acceptance of the project by owner.
3. ROOF SLOPES
a. All roof construction on new buildings
shall have a built-in minimum slope to drains or eaves of 1/4 inch per foot.
b. All replacement roofs shall
have a minimum slope of H inch per foot where feasible; but in no case shall
the slope be less than 1/8 inch per foot. Justification must be requested and
approved by the State Department of Education for roofs less than 1/4 inch per
foot.
4. SUBSTRATE
The type roof system selected shall be compatible with the
substrate and shall be approved by the roofing material manufacturer. All
decking material used for roofing shall be UL fire rated.
5. INSULATION
a. Roof insulation shall be of the type
approved by the roofing manufacturer for the roof assembly in which it is to be
used. The required minimum "R" value shall be specified.
b. On replacement roof projects that do not
have a sloping deck, tapered insulation shall be used where feasible.
6. ROOF TOP EQUIPMENT
a. Roof top equipment on new construction is
not desirable, and the building should be designed to eliminate the use of this
equipment. However, where equipment must be installed on a roof, it shall be
approved by the State Department of Education and shall be installed in
accordance with NRCA (National Roofing Contractors Association) design details
which shall be such that roofing can be easily accomplished without the removal
of the equipment.
b. Where
equipment on the roof must be periodically serviced, easy access and traffic
pads shall be provided.
7. FLASHINGS
a. Flashings should be included in the roof
warranty and shall be applied by an applicator approved by the manufacturer of
the roofing material.
b. In
re-roofing projects, existing metal flashings which are not to be replaced may
be exempted from the warranty.
c.
Perimeter metal flashing shall be of a material other than galvanized steel.
8. PRELIMINARY
REQUIREMENTS
a. A report shall be prepared by
the professional which will include the following items:
i. New Construction
a) Code fire-protection requirement and the
required fire resistance in hours
b) UL roof assembly numbers
c) Type of flashing and roofing system
recommended with justification for its use
d) Roof area
ii. Existing Construction
a) Determination of roof construction-core
where necessary
b) Visual roof
analysis inspection (See form attached.)
c) Code requirements--UL roof assembly
number, if applicable
d) Provide
Class A type roof or match existing roof
e) Recommendations by the professional as to
repair or re-roof
9. BIDDING
a. BID DOCUMENTS
i. For new construction and complete tear-off
of existing roofs, the professional shall specify the roof as a system and
shall include all items which are to be covered under the roof warranty.
ii. When required, the
professional shall state in the section, Instructions to Bidders, that upon
award of contract, the General Contractor and/or Roofing Contractor shall
provide the owner with the installed price of the roofing system.
b. QUALITY ASSURANCE
If requested, the roof contractor shall provide to the Local
Education Agency a letter from the manufacturer of the required roofing
materials that it is an authorized installer and will provide the required
specified warranty for completion.
c. CONFERENCES
i. Pre-Bid Conference
It is recommended that at least seven (7) days before the
bidding of a re-roofing project, a pre-bid conference be held at the project
site. Attendance at the pre-bid conference is not a prerequisite for
bidding.
ii. Pre-Roofing
Conference
On new and re-roofing projects prior to ordering roofing
materials, a pre-roofing conference shall be initiated by the professional. At
such time the roofing contractor shall provide a list of materials to be used,
manufacturer's installation instructions as well as manufacturer's
certification confirming that the materials to be used on the project meet the
specified ASTM Standards.
iii. On re-roofing projects, the following
personnel shall be represented:
a)
Professional Roofing Contractor
b)
State Department of Education Roofing Manufacturer
c) Local Education Agency
iv. On new projects the following shall be
represented:
a) Professional General
Contractor
b) State Department of
Education Roofing Contractor
c)
Local Education Agency
d) Deck
Contractor Roofing Manufacturer Mechanical
Contractor
4. INSPECTION
a. Inspections shall be made by the
manufacturer's technical representative as necessary to obtain the roof
guarantee.
b. The professional or
his representative shall inspect the roof as the work progresses, but in
particular, he shall inspect at the following times and give a letter of
confirmation:
i. Inspect the substrate before
any roofing is done.
ii. Inspect at
the start of roofing installation to assure that the approved materials are
being properly installed.
iii.
Inspect as necessary as the work progresses or when a problem arises.
iv. Final inspection at the end of
the work to give acceptance of the project.
5. HISTORICAL RECORD
The professional shall assist the roofer in preparing the
Roofing Data Sheet provided by the owner for the historical files. (See form
attached.)
6. ANNUAL
INSPECTION
School districts are encouraged to contract with a
professional or a roof inspector to inspect their roof on an annual basis and
submit a written report of any needed repairs and budgeted costs to the school
district superintendent.
